iproute2 fails to build setting LIBBPF_DYNAMIC unless LIBBPF_DIR is defined.

[itugrok at yahoo.com]

Hi Neil,

There were recent build system changes that seem to be related to various build failures, and the cause of much frustrating debugging.

I've had two reports of iproute2 build problems like yours, but neither was reproducible, even by the reporter and from one build to the next. I wasn't able to reproduce the failures myself using the same arch/toolchain, and noted that automated builds of iproute2 are all still succeeding.

One reporter's problems disappeared after doing a "make dirclean", which again points to the build system. I suggest doing that, followed by building the latest master. If you still have problems, please report your build configuration and post the build log somewhere accessible. Those same details for your current build issues would be helpful too.

Regards,
Tony